Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1122
Number of amino acids:118
Molecular Weight:12476.63 Da
Theoretical pI:6.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)108.47%
Cysteine CYS (C)65.08%
Glutamic Acid GLU (E)75.93%
Aspartic Acid ASP (D)21.69%
Glycine GLY (G)86.78%
Phynylalanine PHE (F)43.39%
Isoleucine ILE (I)97.63%
Histidine HIS (H)21.69%
Lysine LYS (K)86.78%
Methionine MET (M)43.39%
Leucine LEU (L)1311.02%
Asparagine ASN (N)75.93%
Glutamine GLN (Q)21.69%
Proline PRO (P)54.24%
Serine SER (S)1210.17%
Arginine ARG (R)00%
Threonine THR (T)86.78%
Tryptophan TRP (W)10.85%
Valine VAL (V)97.63%
Tyrosine TYR (Y)10.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC551
HydrogenH898
NitrogenN140
OxygenO167
SulphurS10

FormulaC551H898N140O167S10
Total Number of Atoms:1766


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    0.590,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.560,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.36, 27.12, 28.81]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:103.305
Grand average of hydropathicity (GRAVY):0.43